The glass breakage pictures presented in this chapter will be structured, focusing on the essence of glass breakage. Identification of unambiguous causes of glass breakage always requires big experience, so such causes should be determined by specialists.
In certain cases it is impossible to identify a clear unambiguous cause on site just on the basis of the glass breakage view. Then checking of the glass cross-section through a microscope might be useful in order to identify the basic or primary breakage, when breakage lines are complicated. As this method is highly expensive, it can be applied only in exceptional cases. It also requires big experience. Only a limited number of institutes are capable to perform an analysis and define the clear cause. However, in most cases, the cause(s) of glass breakage can be defined quite precisely on site after precise and comprehensive analysis.
There always exist several basic rules which prove out for the cases with non-tempered glass and thus they should be taken into account.
Three rules of breakage:
When assessing the pictures of cracking, one should always start from the question about thermal causes, in order to initially ensure clear division of the cracks into the groups of thermal or mechanical cracking.